I know that Jessie and Granville died in Dingwall, Ross-shire but I'm not sure of the dates as of yet, I'm working on that. Apparently Jessie was involved in a shipping disaster in the 1930s and survived; I'm working on finding out more information about that as well. I was told that both Jessie and Granville were born in Golspie which is in Caithness now but I believe it used to be a part of Sutherland (considering the Duke of Sutherland had his stately home there and still stands). I'm not sure where and when Granville married but his descendants, including his granddaughter, settled in Dingwall. Apparently, as time went on, the family dropped the e at the end of the Lowe name.
Carole, I didn't realise this, thank you for pointing it out.